Double-acting band-brake.



D. N. THOMPSON. DOUBLE ACTING BAND BRAKE. APPLICATION rum) APR. 2a, 1900.

Patntad Jan. 19,- 1909.

i TToRNv WITNESSES ing blocks F no N. rHoMrsoN, or owaeo, NEW YORK. I i l l DOUBLE-norms nanmnnum. 1M

Specification of Letters Patent.

I t, {LP-JG. ..Z..-| it Patented Jan. 19, 1909.

Application filed April as, 1908. Serial No. 420,100.

To all whom it may concern: l

Be it known that I, DON N. THOMPSON, a citizen of the United States, residing at Owego, county of Tioga, and State of New York, have invented a certain new and useful Improvement in! Double-Acting Band- Brakes, of which the following is a specification.

My invention relates to a new and useful im rovement in double acting band brakes, an has for its object to so construct a brake of this character whereby each end of the band will be fastened to a sliding block moving upon a suitable guide having suitable ac justable stops upon said guide so that the friction between the drum and the band will assist in the operation of the brake.

With these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claim.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, I will describe its construction in detail referring by letter to the accompan ing drawing formingva part'of this s eci cation, in whichigure 1 is a si e elevation of my improved brake, and Fig. 2, an end View thereof.

In carrying out my invention as here embodied, A represents a rod the two ends of which are threaded as indicated at B and-C also having the key slots D and E formed therein. On the rod A are placed the slidand G. One end of the a plying leiler H is pivoted to the sliding lock G at I, A short distanceupward from that end of the 'ap lying" lever which is secured to the sliding lock 'G is secured the forked end of the forked rod J. The opposite end ofthis forked rod has the thread K cut thereon for threadin into the sleeve L, and thiiJ sleeve is pivoted to the sliding block F at pivoted .to the under side of the inner end of the sliding block G as indicated at O, the opposite end being pivoted to the under side of the inner end of the sliding block F at P.

The stop nuts Q and R are threaded on the op osite endscf the rod A and threaded towar one another until the sliding blocks N indicates the band one end of which is F and G are brought to ether as closely as desired so that the ban N may be drawn about the drum a ainst which it works as tight as desired. Vhen the nuts Q and R have been brou ht to their right adjustment a key is placed within the key slots D and E so that the said nuts will be prevented fromturning. The nuts S and T are then threaded on the rod A far enou h to allow first one end of the rod to be pl iced in the support U then the other end in the support V when they ivill be threaded toward the ends of the rod A until they come in contact with the supports U and V for assisting in holding the rod A in place. The nuts W and Y are then threadedon the outer ends of the rod A until they come in contact with the supports U and V thus also assisting in holding the rod A in position.

Of course it will be readily understood that a suitable lever will have to be secured to the applying lever H for operating the brake.

In practice should the drum around which is placed the band N be moving in the direction of the arrow when the band is tightened about it the friction of the band would hold the sliding block F against the stop nut Q and the further movement of the applying lever would move the sliding block G toward the sliding block F thus tightening the band in the direction of the motion of the drum, and in this way securing the friction on the band as an aid to the application of the brake. Should the drum be revolving in an opposite direction the sliding block G would be held stationary and the sliding block F moved toward said sliding block G and the same result secured as in the movement first named.

Having thus fully described my invention, what I claim as new and useful, is

In a double acting hand brake, a rod the two ends of which have threads and key slots cut therein, two sliding blocks adjustably secured on said rod, stop nuts threaded on the opposite ends of the rod for ad'usting said sliding blocks, an applym ever one end of which is pivotally secure to one of said sliding blocks, a sleeve pivotally'se cured to the opposite sliding block, a forked rod one end of which is threaded in said sleeve, the opposite end being secured to the applying lever, a band adapted to pass eround 'a drum one end of said bana being eflixed my si athre in the/presence 6f two e'efcured ftblthel \cxlnderblsidle dfhthe innetr end subscribing itnesses. o oneo he s i ing occs,t ecpposi e en being secured to the under side of the inner DON THOMPSON 5 end of the opposite sliding block, and nuts Witnesses:

for secliringthe rod to the su iports. FRED C; HILL,

In testimony whereof, I ave hereunto Fnnn G. I IonmN. 

